Wouldn't a buy to let flat be easier? Gives you a yield straight away and increases in capital value generally outpace inflation.

I've got one.

I assume that was relatively straightforward? Can't see any ethical issues with it either...

I'm sure the solar farm idea has legs, but not sure how useful they are, they look horrific, and a site will be difficult to find.

Finding a site will be the most difficult bit. But the returns are better than BTL and the security is better too, with a 25 year lease. I'm looking to diversify a bit. I'll be planting some woodland as well (different site) and probably an ISA and some truffles.

I cannot help thinking, although I am reluctant to mention, that there are projects on this board that are in need of investment...

in need of investment or worthy of investment?

Certainly in need. I'd expect some are worthy, but I am in no place to judge.

But this does come up relatively often: that someone has some money to invest, and there is an absolute shed load of talent and ability on this board, so I think there is potential to put some kind of project together.

Not this time and probably not for any one large investment, but maybe we should have a think about it.